Weird sparkplugs setup on 8N

EmmettDave · May 21, 2017

Sparkplugs no. 3 and 4 on this 8N don't go straight into the head--they go into a "riser" that is screwed into the sparkplug holes. What's going on here? Is that normal?
Thanks much for any help.

R Geiger · May 21, 2017

They sound like adapters to keep the plugs from fouling with oil.

JMOR · May 21, 2017

Anti-fouler. Lengthens heat path out of plug, causing them to run at much higher temperature to burn off oil from a worn out engine, so plug can still fire.

Royse · May 21, 2017

Sounds like anti-foul adapters.
Do they look like [b:f1876ba425]these?[/b:f1876ba425]

EmmettDave · May 21, 2017

Yep, that's what they look like. Everybody's posts agree--I guess that's what they are alright.

Thanks much.

grayrider · May 21, 2017

Exactly what Geiger said, ran a TO30
Ferguson for a short while with them and
then had to do a rebuild, my Fergie got
so bad that it was fouling the plugs
with the plug extensions....

Ramrod · May 21, 2017

Those are markers for cylinders with bad rings.

Dean · May 21, 2017

Thanks for the link.

Unlike many/most snake oil "fixes" from times past, anti foul adapters do, indeed, work.

I was unaware that they were still available.

Dean

Roger in Iowa · May 21, 2017

Take the risers out, they may be what is causing #3 and 4 to not fire. May be full of carbon.

EmmettDave · May 21, 2017

(quoted from post at 11:37:37 05/21/17) Take the risers out, they may be what is causing #3 and 4 to not fire. May be full of carbon.

Ahah! Now THAT would be too good to be true--I'll try it!

Hobo,NC · May 21, 2017

(quoted from post at 20:42:37 05/21/17) Those are markers for cylinders with bad rings.

Are valves out of adjustment causing incomplete combustion.

EmmettDave · May 21, 2017

(quoted from post at 12:07:25 05/21/17)

(quoted from post at 20:42:37 05/21/17) Those are markers for cylinders with bad rings.

Click to expand...

Are valves out of adjustment causing incomplete combustion.

I've never checked the valves--how often should one check them on an 8N?

Weird sparkplugs setup on 8N

EmmettDave

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R Geiger

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JMOR

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Royse

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EmmettDave

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grayrider

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Ramrod

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Roger in Iowa

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Hobo,NC

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